17-4ph stainless hlau tshav kub kho

17-4PH stainless hlau tau txais txiaj ntsig zoo vim nws cov khoom siv kho tshuab tau raug tswj tau los ntawm kev kho cua sov. Cov engineers tuaj yeem sib npaug lub zog, toughness, thiab corrosion kuj raws li kev thov sib txawv. Kev nkag siab txog cov txheej txheem kev kho cua sov yog qhov tseem ceeb rau kev xaiv cov khoom tsim nyog thiab ua tiav cov nqi tsim khoom.
Kab lus no yuav piav qhia txog cov txheej txheem kev kho cua sov ntawm 17-4PH stainless hlau kom ntxaws, sib txuas cov ntaub ntawv cov ntaub ntawv, cov ntaub ntawv siv tau, thiab nws cov txiaj ntsig tseem ceeb.

 

Dab tsi yog 17-4PH Stainless Hlau?

17-4PH (UNS S17400 / EN 1.4542 / AISI 630) yog cov nag lossis daus-hardening martensitic stainless hlau.Tsis zoo li austenitic qib xws li 304 lossis 316, 17-4PH tau txais nws lub zog feem ntau los ntawm kev kho cua sov, tsis ua hauj lwm los ntawm kev kho cua sov.

Cov yam ntxwv tseem ceeb:
Thaum tshav kub kub- kho tau rau siab zog
Zoo corrosion kuj nyob rau hauv ntau qhov chaw
Cov khoom siv ruaj khov tom qab kev laus
Dav siv nyob rau hauv aerospace thiab industrial Cheebtsam

 

Txheej txheem cej luam ntawm 17-4PH Cov Txheej Txheem Kub Kub

Kev kho cua sov ntawm 17-4PH stainless hlau muaj ob theem tseem ceeb:
1️⃣ Txoj Kev Kho Mob (Cov Cai A)
Qhov kub thiab txias: 1020-1050 degree
Lub hom phiaj: Dissolve alloying ntsiab, Ua ib tug mos, machinable martensitic qauv.
Qhov tshwm sim: Lub zog muaj zog, qhov zoo tshaj plaws rau machining thiab sib sau
2️⃣ Kev laus (Precipitation Hardening)
Qhov kub thiab txias: 480-620 degree
Lub hom phiaj: Tsim cov tooj liab zoo- nplua nuj precipitates, Ua kom muaj zog thiab tawv.
Cov txiaj ntsig: Cov khoom siv kho tshuab raws li kev xav tau ntawm daim ntawv thov

 

17-4PH Stainless Steel Common Aging Conditions thiab Mechanical Properties

Qhov xwm txheej	Kev laus Temp (degree)	Tensile zog (MPa)	Yield zog (MPa)	Hardness (HRC)	Kev siv yam
Mob A	-	~930	~725	~28–32	Machining theem
H900	~480	~1310	~1170	40–44	Lub zog siab tshaj plaws
H1025	~550	~1070	~1000	35–38	Sib npaug zog
H1150	~620	~930	~860	28–32	Ntau dua toughness

Kev nkag siab tseem ceeb:Kev laus qis dua ua kom muaj zog dua thiab muaj zog dua, thaum qhov kub ntawm cov laus tuaj yeem txhim kho ductility thiab toughness.

 

17-4PH puas tuaj yeem ua tom qab kho cua sov?

Tsis yog, 17-4PH yog qhov nyuaj heev rau tshuab tom qab kev kho cua sov tag nrho (piv txwv li, H900 ncov- laus lub xeev)​​ vim tias nws ncav cuag ~ 38 HRC thiab muaj kev ua haujlwm siab- tawv tawv; machining nyob rau hauv tus mob no yuav tsum tau txiav speeds txo los ntawm 30-40%, rigid carbide tooling, thiab nquag hloov cov cuab yeej. Nws raug nquahu kom ua cov machining ntxhib hauv lub xeev cov kua nplaum (≈ 277 HB) thiab tom qab ntawd siv cov kev kho cua sov zaum kawg.

 

Kev kho cua sov puas cuam tshuam rau 17-4PH corrosion tsis kam?

Kev kho cua sov muaj qhov cuam tshuam tsawg heev ntawm kev tiv thaiv corrosion ntawm 17-4PH, raws li nws cov PREN (~ 24-30) yog txiav txim siab los ntawm nws cov tshuaj muaj pes tsawg leeg (17% Cr, tsis muaj Mo); Txawm li cas los xij, kev loj hlob ntau dhau los lossis kev ua kom txias tsis zoo thaum kho cua sov tuaj yeem txo qis pitting tsis kam, yog li kev tswj cov tshuaj annealing thiab kev laus yog qhov tseem ceeb los tswj kev ua haujlwm zoo corrosion.

 

17-4PH stianless steel Kev kho cua sov vs Kev Ua Haujlwm Txias

Yam	17-4PH Kev kho cua sov	Austenitic Cold Work
Kev tswj lub zog	meej	Hloov pauv
Los ntawm -hardness	Yog lawm	Tsis muaj
Dimensional stability	Siab	qis
Rov ua dua	Zoo heev	txwv

 

Cov ntawv thov raug siv los ntawm 17-4PH Thaum tshav kub kub kho mob

H900 Kev mob
✔ Aerospace fittings thiab brackets
✔ Siab - lub zog ncej thiab fasteners
✔ Hnav- cov khoom siv kho qhov muag tiv taus

H1025 / H1150 Cov Cai
✔ Valve stems thiab twj tso kua mis Cheebtsam
✔ Cov khoom siv roj & roj
✔ Cov khoom raug cuam tshuam los yog cyclic loads

Xaiv qhov kev laus kom raug zam dhau - engineering thiab txo cov nqi khoom siv tsis tsim nyog.